Furnace



Dec. 10,- 1940. J. MORTENSON 2,224,460

FURNACE Original Filed June 2, 1937 2 Sheets-Sheet 1 FIG-I JOHN MORTENSON A'r'roR/NET Dec. l0,

FIG-4 J` MORTENSON FURNACE Original Filed June 2, 1937 *2. Sheets-Sheet 2 JOHN MORTENSON I NVE. N 'row Patented Dec. 10, 1940 PATENT ori-uca FURNACE John Mortenson, Canton, Ohio Application June 2, 1937, Serial No. 145,971 Renewed October 25, 1939 This invention relates to furnaces, and more particularly to furnaces of the continuous mufile type, and a principal object of the invention is to provide new and improved apparatus of this character.

In the drawings accompanying this specification and forming a part of this application, I have shown, for purposes of illustration, one embodiment which my invention may assume, and in the drawings:

Figure l is a broken, central, longitudinal, vertical sectional view, through an embodiment of the invention,

Figure 2 is a broken, horizontal, sectional view, corresponding substantially to the line 2-2 of Figure 1,

Figure 3 is a transverse, vertical sectional view, corresponding substantially to the line 3--3 of Figure 1.

Figure 3a is a fragmentary longitudinal vertical sectional view corresponding substantially to the line 3a--3a of Figure 2,

Figure 4 is an enlarged, broken,` perspective view of combustion conduits or flues employed in connection with the invention, while 'Figure 5 is an exploded View of a portion of one of said combustion conduits or ues.

As shown in the drawings the furnace is of the and carries conveyor means I6, having suspend, ing means from which objects to be treated are' suspended, as indicated at I'l, the suspending means being arranged to travel through the fur.

nace along a path indicated by dotted lines, as at I8, in Figure 2. This construction is well known in continuous enameling furnaces and is thought to require no further description.

The rear of the furnace is provided with a pit I9, in the bottom of which, and forming part of the bottom wall I2, is a plurality of longitudinally extending, laterally spaced piers 29 of refractory material, each extending the full length of the pit I9J At each side of the furnace, and spaced inwardly from the side walls I9, are mulle defining walls 2I and 22, each reaching entirely to the roof I3, rearwardly to t-he rear wall II, and forwardly to offsets 23 in the side walls IiI. The lower end of the mule Wall 2| rests upon brickwork 24, supported upon, and overlying piers 25 and 26, while the mullle wall 22, at the bottom, is

supported by similar brick-work 21, overlying and resting upon piers 28 and 29. The piers 25 and 28 arevwlder than the intermediate piers 26 and 29, and are staggered longitudinally of the pit I9; that is, a Wider pier 28, alongv one side wall I0, will lie transversely in line with a smaller pier 26 adjacent the opposite wall ID, and the pier 25 will lie transversely in line with the pier 29, and so on, this arrangement of piers extending from the rear Wall I I to the forward part of the pit I9. At the forward part of the pit I9 an opstanding transverse wall 39 is provided, the top 3l of which supports overlying brick-Work. Forwardly of the Wall 39 are laterally spaced piers 32, and forwardly of the piers 32 brick-work is provided defining longitudinally extending flues 33, at their outer ends communicating with a cross flue 34, and with a stack 35, a top layer 36 of refractory material overlying and being supported by the 'top portion 3| of the wall 39, by the piers 32 and by the brick-work deningthe flues 33, andv the chambers thus providedl communicate with the chambers 3l between the muiile side walls. Products of combustion are introduced into the chambers 31 in a manner presently described, leave the chambers 3l, and travel through the iiues 33 to cross flue 34, and thence out of the stack 35.

` Supported by the spaced `longitudinally lextending piers 29, is a plurality of combustion" chambers 38, 39, 49, 4I, and 42. The combustion chamber 39, for example, comprisesy a plurality of slabs or plates 43 of refractory material, laid end to end transversely of the furnace, each plate having an end 'groove 44, adapted to receive the tongue 45 of an adjacent plate, the plates 43 preferably being of such length as to extend entirely across one pier 29 to the center of the adjacent pier 20 at each side thereof, so that the division lines between the plates 43 coincide with the center of every other pier 29, as best shown in Figure 3.

Each of the plates 43, along its flat face, is provided with longitudinal grooves 45 and 4l, arranged slightly inwardly of each longitudinal edge. The groove 46 is adapted to receive tongues 48 of edgewise aligned side members 49 and 59, and the side members 49 and 5B, adjacent the upper ends thereof, have a tongue and groove connection, indicated at 5i, with arcuate sections 52 and 53, and the sections 52 and 53 have tongue and groove connection, as at 54', with arcuate sections 55 and 56, while the arcuate sections 55 and 56 have tongue and groove connection, as at 51, with opposite side walls 58 and 59, the lower edges of the side walls 58 and 59 having tongues y6ll tting in the groove 4l of the plate 41h Each plate 43 `has sidesections 49 and 50, arcuate sections 52, 53, 55, and 56, and side sections 58 and 59, associated therewith in the saine'manner, thereby providing the continuous combustion conduit 39 which extends transversely entirely across the pit I9. T-he next transverse combustion chamber or flue 38, is made up of plates 6|, side walls 62, and arcuate sections (not shown), similar to and assembled in the manner of, those already described, the combustion chamber 38 being spaced longitudinally of the furnace with reference to the combustion chamber 39, as indicated at 63. Spacing Webs 64 are interposed at intervals between the side Walls 58 and 59 o-f the combustion chamber 39 and the side walls 62 of the combustion chamber 38, eac-h spacing web 64 having tongue and groove connection, at each side, as at 65, with the adjacent side walls 62, 58 and 59 of the combustion chambers 38 and 39, respectively. 'Ihe combustion chambers 48, 4i, and 42 are identical in construction with the combustion chambers 38 and 39, already described and are spaced and interconnected by the webs 64 in the same manner as the chambers 38 and 39.

Extending through the side Wall I6 is a burner 66 adapted to direct products' of combustion through the combustion chamber 38, which at its opposite end discharges behind the mule wall 2|, into the chamber 31, traveling forwardly, and

thence out through the iiues 33 and 34 to the stack 35. The combustion chamber 39 also has a burner 67 discharging thereinto at the side of the furnace opposite to that in which the burner 68 is located, the products of combustion passing through the combustion chamber 39 and then emerging behind the muille Wall 22, into the chamber 31, traveling thence .forwardly and outwardly through the lues 33 and 34 to the stack 35. 'Ihe combustion chamber 43 has its burner 68 located upon the same side of the furnace as the burner 66, the combustion chamber 4I has its burner 69 located on the same side as the burner 61, while the combustion chamber 42 has its burner 10 at the opposite side, the products of combustion in the case of one combustion chamber entering at one side of the'furnace and discharging at the opposite side, while the products of combustion for the next adjacent combustion chamber enter at that side of the furnace adjacent the discharge of its neighbor, and so on,

every other one of the burners discharging in opposite directions. Of course it will be under# stood that all of the parts which go to make up the combustion chambers described comprise refractory material able t0 withstand great heat.

By this arrangement it will be apparent that circulation is maintained between the combustion chambers 38, 39, 40, 4l, and 42 both below, at the sides, and above, thereby cooling the radiating surfaces of the combustion chambers and obviating any possibility of their burning out. Additionally it will be apparent that a muffle arrangement is provided which will have high heating efliciency as well as providing a strong and durable construction. The interlocking of the various refractory pieces, as well as the interlocking of the pieces between the individual combustion chambers, prevents any possibility of the parts becoming dislocated, and should one of the individual combustion chambers become damaged, it may be replaced without tearing out the remainder ofthe combustion chambers.

It will be apparent to those skilled in the art that I have accomplished at least the principal object of my invention, and it also Will be apparent to those skilled in the art that lthe embodiment herein described may be variously changed and modified, without departing from the spirit of the invention, and that the invention is capable of uses and has advantages not herein specifically described; hence it will be appreciated that the herein disclosed embodiment is illustrative only, and that my invention is not limited thereto.

I claim:

1. A furnace comprising: enclosing walls; oppositely arranged Walls spaced inwardly from two of said enclosing walls to define chambers for passage of products of combustion between said walls; a plurality of refractory combustion chambers disposed within said enclosing walls, extending within the space defined by said inner walls, communicating with the chambers between said inner and enclosing walls, and adapted to discharge the products of combustion into said chambers; -a burner for each of said combustion chambers, the burners vfor some of said combustion chambers being arranged in one set of ends thereof and discharging therethrough in one direction and other burners being arranged in another set of ends and discharging in the opposite direction; a supporting pier in line with, and smaller than, the outlet of each combustion chamber, and a supporting pier at the inlet of each combustion chamber, and larger than said combustion chamber, said latter pier accommodating the related burner; and closure material overlying and spanning the distance between said piers, said closure material underlying the lower ends of, and supporting, said inner walls.

2. A furnace comprising: enclosing walls; oppositely arranged walls spaced inwardly from two of said enclosing walls to dene chambers for passage of products of combustion between said walls; a plurality of elongated refractory combustion chambers disposed within said enclosing walls, extending within the space dened by said inner Walls, communicating with the chambers between said inner and enclosing walls, and

adapted to discharge the products of combustion f into said chambers, each of said combustion chambers including a plurality of longitudinally aligned interlocked sections; supporting means for supporting said combustion chambers, constructed and arranged to allow air circulation about said combustion chambers; a burner for each of said combustion chambers, the burners for some of said combustion chambers being a1'- ranged in onefset of ends thereof `and discharging therethrough in one direction and other burnersfbeing arranged in another set of ends and discharging in the opposite direction; a supporting pier in line with and smaller than the outlet of each combustion chamber, and a pier at the inlet of each combustion chamber, larger than said combustion chamber, said latter pier accommodating the related burner; and closure material overlying and spanning the distance between said piers, said closure material underlying .the lower ends of, and supporting, said oppositely arranged Walls.

3. Apparatus of the character described, comprising: a furnace construction, including a passage at each side for the products of combustion, and an elongated treating chamber; and a plurality of elongated combustion chamber means of refractory material, each including a plurality of longitudinally aligned sections, each section being made up laterally of a plurality of divided parts, the upper sectional parts of which are o in laterally spaced relation;

2,224,460 transversely arched, said combustion chamber means extending transversely across said treating chamber and one end of one of said combustion chamber means communicating with one of said side passages, and the opposite end of the other combustion ,chamber means communicating with the other side passage.

4. Apparatus of the character described, comprising: a furnace construction, including oppositely disposed passages for the products of combustion, and a treating chamber; a plurality of elongated combustion chamber means, each made up of a plurality of longitudinally aligned sections, and each communicating with one of said oppositely disposed passages, and disposed and connecting means arranged at intervals between said combustion means for connecting the same together.

5. Apparatus of the character described, comprising: a furnace construction, including oppositely disposed passages for the products of combastion, and a treating chamber; a plurality of spaced elongated combustion chamber means of refractory material, each including a plurality of longitudinally aligned sections, each section being made up laterally of divided parts, said combustion chamber means each communicating with one of said passages and passing through said treating chamber; and refractory connecting means arranged at intervals between said combustion chamber means and interlocked with the longitudinally aligned sections.

6. Apparatus of the character described, comprising: a furnace construction, including oppositely disposed passages for the products of combustion, and a treating chamber therebetween; a plurality of spaced elongated combustion chamber means of refractory material, each including a plurality of longitudinally aligned sections', each section being made up laterally of divided interlocking parts, each of said combustion chamber means communicating with one of said passages and passing through said treating chamber; and refractory connecting means arranged at intervals between said combustion chamber means and interlocked with the longibeing supported upon said supporting means, cut

off from the spaces between said supporting means, and each communicating with one of said oppositely arranged passages.

8. Apparatus of the character described, comprising: a furnace construction, including a passage at each side for the products of combustion,

and an elongated treating chamber; and a plurality of elongated combustion chamber means of refractory material, each including a plurality of longitudinally aligned sections, each section being made up laterally of a plurality of divided parts, said combustion chamber means extending transversely across said treating chamber and one of said combustion -chamber means communicating with one of said side passages, and the opposite end of the other combustion chamber means communicating with the other side passage.

JOI-1N MORTENSON. 

